darcs patch: Implementation of aton and ntoa outside the IO monad

Mon Sep 25 16:55:55 JST 2006 Robert Marlow * Implementation of aton and ntoa outside the IO monad This is a second attempt at the earlier patch inet_ntoa and inet_aton can be implemented purely to avoid the need for the IO monad. Additionally, inet_addr is currently incorrect due to using the inet_addr C function which is considered obsolete due to incorrectly failing while converting 255.255.255.255 as an address.